Well the barrels off. Drove the retaining pin out easily enough & because the barrel was already loose it came off quite easily. Pretty much a straight pull as its not threaded but the portion that runs into the cylinder is very rough. Annular rings all over it, presumably so it can be driven into the bored hole in the cylinder, which has a better finish, & pretty much hold itself there & once in place cross drilled & pinned to finally secure it. There was no sign of any jointing compound or thread lock in the joint, it seemed purely mechanical.

Decided to clean it up, with a wire brush, dimple it a bit with a centre punch avoiding the curved portion that fits around the loading tap, close the pin channel up a bit then apply a high modulus filled epoxy, drive the barrel back in replace the pin & wait till it cures.

In the meantime I can have a look at the stock. I think I'll keep the same pale colour, it reminds me of a school desk. Probably about the same vintage as the Tornado.